Effect of steady magnetic field on undercooling of Al-Cu alloy melts

被引：8
|
作者：
Guo, Rui [1 ]
Li, Chuanjun [1 ]
He, Shengya [1 ]
Wang, Jiang [1 ]
Xuan, Weidong [1 ]
Li, Xi [1 ]
Zhong, Yunbo [1 ]
Ren, Zhongming [1 ]
机构：
[1] Shanghai Univ, State Key Lab Adv Special Steel, Shanghai 200, Peoples R China
来源：
EPL | 2019年 / 126卷 / 04期
关键词：
SURFACE TENSIONS; SOLIDIFICATION; NUCLEATION;
D O I：
10.1209/0295-5075/126/46001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The undercooling behaviors of three Al-Cu alloy melts in a steady magnetic field (SMF) were investigated by differential thermal analysis. It was found that the nucleation temperatures of primary phases in three alloys gradually shifted to a lower temperature with increasing the SMF intensity, i.e., the undercooling was enhanced in the SMF. The enhanced undercooling mainly results from the increase in the liquid/solid interfacial free energy in the SMF. In addition, the reduction of migration rates of atoms in the liquid phase in the SMF is partially responsible for the increase in undercooling. Copyright (C) EPLA, 2019
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页数：6
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